NASA is taking this quite seriously. Administrator Jim Bridenstine is talking about possible probes to send to Mars.

There is speculation that microbes were brought to Venus by Soviet Venera probes. In that case it would just be a veneral disease. But this is not very likely. We have extremophile microbes on Earth that survive sulphuric acid but not at the concentrations present in the clouds of Venus.

Very exciting news. Lots of scientists will try to come up with alternative theories for the existence of Phosphine. But until now Phosphine was regarded as a very good indicator for biologic activities on rocky planets.